You need the TM30 for 90 day reporting. I didn't have a new one on my return to Thailand and my property manager said I didn't need one due to returning to the same residence. Pr|k cost me 1600 baht because of this BS advice
Just keep in mind something that others haven't mentioned when they've said you gotta get your account up for your 2nd 1 year extension, if you deposit 65k a month for the full 12 months of your first extension, you don't need to take your account up to the 800k baht to apply for this 2nd extension